The Energy Law Act of 10 April of 1997 (with later amendments) established the basis for third party access, independent electricity and gas system, independent power producers, renewable energy sources, least cost planning, integrated resource planning, energy regulatory authority, high efficiency heat and power production, demand side management and energy efficiency labels.

Reduction of the fees:

Facilities producing electricity from renewable energy sources (up to 5MW) are eligible to benefit from a reduced grid connection fee. Also, they are exempt from paying annual license fees. Energy providers are allowed to incorporate costs of developing renewable energy into their tariff regimes.

Amended:

Quota system and green certificates:

Since 1 October 2005, energy enterprises that generate, trade or purchase electricity are obliged to purchase or generate a certain amount of electricity from renewable sources of energy. The obligation will be met through the acquisition and redemption of certificates of origin that certify electricity produced from renewable sources. Transmissions and distribution operators are obliged to accept renewable sources of energy. (For further details please go to "Certificate of Origin Trading System" entry). Similar scheme for heat produced from renewable energy sources is being established (entered into force on 1 January 2007).

The amendment of 26 July of 2013 introduced the following simplifications of setting up a microinstallation (renewable energy sources with no more than 40kW of total installed electrical capacity, connected to electrical grid of a voltage lower than 110kV or no more than 120 kW of total installed heat capacity):

Applications to connect a microinstallation to DSO’s grid will no longer be subject to a connection fee nor required to attach documents confirming the admissibility of locating the installation in the investment area;

In some cases, there will be no need for an interconnection agreement;

Selling energy generated by a microinstallation will not be regarded as a business activity if it is conducted by an individual who is not running a business;

If an individual’s microinstallation is connected to the ex officio electricity supplier’s grid, it must buy all the energy offered for sale for 80% of the previous year's average electricity price.

Moreover, it provides for the following provisions:

protection of vulnerable consumers;

expanding the definition of renewable energy sources by two energy resources: aerothermal and hydrothermal;

support for energy-intensive industry.

In order to make the gas market more transparent and competitive, the Small Tri-Pack imposes the obligation to sell at least 30% (40% since 2014 and 55% since 2015) of the gas at the exchange markets. The aims of the other provisions of this Act are i.a.: strengthening the consumers’ rights, exemption for the prosumers (persons producing energy from renewable resources for their own purposes) from the obligation to obtain the license for the power supply as well as separation of the supervision over the gas distribution networks and gas trading businesses.